What is the normal constriction of the pupils when bright light shines on the retina?

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Multiple Choice

What is the normal constriction of the pupils when bright light shines on the retina?

Explanation:
Pupillary light reflex is the normal constriction of the pupils when bright light shines on the retina. When light hits the retina, signals travel via the optic pathway to the brainstem and trigger a parasympathetic response that tightens the iris sphincter muscle, causing the pupils to narrow. This reflex often happens in both eyes (direct and consensual responses) to protect the retina from excessive light. The other terms refer to different processes: accommodation changes lens shape for near vision, fixation is about keeping gaze on a target, and the macula is a central retina region responsible for sharp vision.

Pupillary light reflex is the normal constriction of the pupils when bright light shines on the retina. When light hits the retina, signals travel via the optic pathway to the brainstem and trigger a parasympathetic response that tightens the iris sphincter muscle, causing the pupils to narrow. This reflex often happens in both eyes (direct and consensual responses) to protect the retina from excessive light. The other terms refer to different processes: accommodation changes lens shape for near vision, fixation is about keeping gaze on a target, and the macula is a central retina region responsible for sharp vision.

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